Forwarding, as it may be useful to others.
---------- Forwarded message ----------
From: Kinkie <gkinkie@xxxxxxxxx>
Date: Sun, Nov 16, 2014 at 6:27 PM
Subject: Re: Centralized Squid - design and implementation
To: alberto <alberto.furia@xxxxxxxxx>
On Sun, Nov 16, 2014 at 5:53 PM, alberto <alberto.furia@xxxxxxxxx> wrote:
> Hi Kinkie
>
> On Sun, Nov 16, 2014 at 5:22 PM, Kinkie <gkinkie@xxxxxxxxx> wrote:
>>
>> if (dest_hash)
>> return "PROXY local_proxy1:port; PROXY local_proxy2:port; DIRECT";
>> return "PROXY local_proxy2:port; PROXY local_proxy1:port; DIRECT"
>> }
>> This will balance by the final digit of the destination IP of the
>> service.
>
>
> With this configuration i can only balance between two nodes in normal
> situation right?
> Whati if i would like to have more nodes balancing the traffic? In case of
> very high load for example.
The hashing is a bit simplicistic. You could do something like (again:
untested):
// if the code works, this is the only tuneable needed. Everything
else self-adjusts
var proxies = ["PROXY proxy1:port1", "PROXY proxy2:port2", "PROXY
proxy3.port3"];
function hash(host, buckets) { // returns a host-dependent integer
between 0 and buckets
var hostip = dnsResolve(host);
if (!hostip) // dns resolution failure
return 0;
return hostip.slice(hostip.lastIndexOf(".")) % buckets;
}
function FindProxyForURL(url, host) {
var h = hash(host, proxies.length+1);
var p = proxies;
for (var j = 0; j < h; ++j)
p.unshift(p.pop()); // rotate the "p" array
return p.join("; ") + "; DIRECT";
}
--
Francesco
--
Francesco
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